A wiki is a CMS for collaborative content creation, typically with a flat content structure and heavy cross-referencing.
A wiki is a type of content-management system designed to let users build content rapidly, typically with thorough cross-referencing. Editing is facilitated by text markup and template-based paging. Wikis are usually intended for collaborative editing, so many applications offer tools such as revision control to enable curation. Most depend on a browser for user interface.